Lots of people know that bond yields influence fixed mortgage rates. But not so many know what influences bond yields.
There are actually countless factors and you could never list them all because some are random or can’t be anticipated (like the subprime catastrophe).
That said, the key bond drivers are inflation expectations and the supply/demand for Canadian treasuries. Those things hinge off of global economic performance (especially the performance of the U.S. economy), the risk and returns in other financial markets (like the stock market), the supply of new bonds, the Bank of Canada’s monetary policy, and the strength Canada’s economy.
Canada’s economic performance and inflation outlook are understandably paramount. The common gauges of these things are Canada’s monthly and quarterly economic reports.
According to Ryan Brecht, Senior Economist at Action Economics, five reports affect government bonds the most, in this order…
- Labour Force Survey – The key figures are:
- Net Change in Employment
- Unemployment rate
- CPI Report – The key figures are:
- Annual change in total CPI
- Annual change in core CPI
- GDP Report –– The key figure is:
- Quarterly GDP
- Retail Sales Report – The key figures are:
- Monthly change in total retail sales
- Retail sales excluding autos
- Monthly Survey of Manufacturing – The key figure is:
- Monthly change in manufacturing shipments
“Of course, a key caveat to this list is that Canadian data is never taken in isolation,” says Brecht. “The market tends to track the direction of U.S. Treasures, with spreads adjusting based on the Canadian data and other factors.”
Brecht’s point about the United States’ influence on Canadian rates cannot be understated. Bank of Canada research has found that:
“U.S. macroeconomic announcement surprises explain a substantial part of Canadian interest rate movements.”
That, of course, is because Canada’s fortunes are so tied to our southern neighbour.
In any event, if your goal is to be a bond market prophet, there’s a lot you have to follow.
Unfortunately, there are few on earth who can put all the puzzle pieces together and know where rates will be “x” months down the road…
(Chart data courtesy of Bank of Canada)
_____________________________________________________
Sidebar: Several other metrics also move bonds, especially when their readings surprise the market. Samples include Canada’s budget deficit/surplus, the Canadian Purchasing Managers Index, and Canadian International Merchandise Trade.












BMO Gives Edge to Variables
BMO says, “Over the past 30 years it has been more cost-effective for borrowers to have a variable-rate mortgage 82% of the time.”
That appears true according to BMO’s assumptions. We did a slightly different test though, and will talk about that in a moment.
There is a problem with these types of studies, however, and that is sample size. There have been very few cases where history resembles today. In fact, we’ve never been witness to a monetary policy rate near 0%.
Nonetheless, BMO economist, Doug Porter, had this to say in support of variable rates:
On the other hand, BMO’s report made several points upholding fixed rates. It said:
That last point is where you can look at things in two ways. BMO arrived at its conclusions by comparing posted rates to prime rate (their chosen proxies for fixed and variable mortgage rates). Prime is a good approximation for variable rates but no one pays posted fixed rates anymore.
So we did the same study using discounted fixed rates (i.e., 1.5% off of posted, which seems reasonable). The results were very different…click on the chart below.

With these assumptions, there were at least six periods in recent history when fixed rates beat variable rates at prime. Put another way, discounted fixed rates would have outperformed prime rate almost half the time. (Mind you, if big discounts to prime were available once again, variable rates would fare better.)
BMO declares that the optimal choice “depends on the individual.” That, of course, is true as always.
Interestingly, if we forget about chart data for a moment, it appears BMO presents more arguments in support of fixed rates than it does for variable rates. In addition to its comments above, BMO says:
Despite all of this, BMO says its “core view” is that:
But what does “slightly favour” mean? If we assume a 55% probability, then it’s little better than a coin flip.
For most people, if they faced a 45% probability of losing money, they’d insure against it. Fixed rates provide such insurance, and if rates rise 2.5% or more over the next few years, that insurance will start looking pretty good.
Our perspective isn’t meant to be a blanket endorsement of fixed rates, but the above is definitely something to think about if you’re on the fence.
Posted at 12:04 AM in Mortgage Commentary, Mortgage Tips & Advice | Permalink | Comments (23)